Its main feature is the ability to communicate while consuming very little power.

That is why it is increasingly used in portable products such as smart watches, tracker devices or GPS watches.

What is the difference between Bluetooth and the Smart Bluetooth?

SMART Bluetooth and Bluetooth are different from the "classics". Regular Bluetooths consume much more energy and at a higher transfer rate. That is why it is used frequently with headphones or hand free devices, for example.

Its pairing mode is also different.

SMART Bluetooth products do not appear in the list of Bluetooth devices on a phone. They need an application to be downloaded with it. The only pairing option is with this application!